0889370 (Watts) | 2-1/2 - 4 Inch | 957/957RPDA/LF957RPDA First Check Repair Kit | Red Silicone DiscThis Check Assembly Kit Includes The Parts Necessary to Repair or Replace The First Check of Series 957, Reduced Pressure Zone Assembly, or Reduced Pressure Detector Assembly, Series 957RPDA This Kit Consists of All Parts Necessary to Repair The Second Check Assembly of The Applicable Valve. All Parts Are Genuine And Original to The Valve. Watts 0889370